单项选择题
A. When is it taking place B. Yes, I can make it C. I have some input I’d like to make D. Is that OK E. Yes, he’ll be here F. I won’t be able to attend G. No, he’s flying to San Francisco H. He’s got keen insights
A.reduce B.listen C.be quiet D.concentrate
A. begin B. end C. be another ice age D. start